MPL-B680B-M-X227 MPL 48ALLEN BRADLEY ABB SACE PLC

MODBUS RTU

MODBUS RTU is a non-proprietary serial communications protocol that is widely used in

the process control industry. The protocol was developed by Modicon for PLC

communications and later released for public use.

This protocol is available in all major Human Machine Interface (HMI) software packages

and terminals. Many of the major controller and PLC manufacturers also offer MODBUS

protocol as a standard or optional protocol in their instrumentation.

The hardware over which MODBUS RTU communications are performed is not defined

by the protocol. MODBUS RTU is supported on RS-232, RS-422, RS-485, Ethernet and

other electrical standards. It should be noted that MODBUS RTU, MODBUS ASCII and

MODBUS Plus are unique communication formats, and are not compatible with each

other. This document will discuss MODBUS RTU only.

MODBUS TCP

MODBUS TCP is a MODBUS RTU message transmitted with a TCP/IP wrapper and sent

over an Ethernet network instead of serial lines. The Server does not have a SlaveID as

in RTU since it uses an IP Address instead.

MPS III Fan System Monitoring and Cooling Manufacturers ABB,

Bailey Model(s) ABB Bailey Infi 90, ABB Bailey Infi 90 and Net 90

Estimated Shipping Size Dimensions: 19.0" x 2.0" x 13.0" (48.3 cm x 5.1 cm x 33.0 cm)

Weight: 11 lbs 7.7 oz (5.2kg )

Country of Origin: United States Ships from Webster NY, USA MPS III Fan System Monitoring and Cooling

800xA for Symphony Plus Harmony communicates with the control systems  through a

Cnet-to-computer interface (IET800. PNI800).

800xA for Symphony Plus Harmony is a distributed process management and  control system.

Using a series of integrated Harmony control units, the system  allows monitoring and control

of process variables such as flow rate,

temperature,  and pressure according to a control configuration that the engineer or technician  defines.

A Harmony control unit is a controller and its I/O devices connected for  communication on control network (Cnet).

800xA for Symphony Plus Harmony operates in a Windows environment on  personal computer hardware.

Using interactive process graphics, the operator can  monitor and control all Analog loops and Digital devices

interfaced to the network  through Harmony control units.

800xA for Symphony Plus Harmony provides maintenance personnel with the  capability to globally monitor

the operating status of any system component on the  network, and to diagnose component failures from any workstation.

800xA for Symphony Plus Harmony also provides the Harmony Executive Service.

It is an 800xA service that controls underlying 800xA for Symphony Plus Harmony  services.

Accuracy

Time synchronization accuracy of the Server is valid when the Server is in time 

synchronization mode. The options are:

• Low accuracy (lowest accuracy); priority 0.

• Low accuracy battery backed; priority 3.

• High accuracy battery backed; priority 6.

• IIOIS20 node; priority 9.

• IIOIS20 SCSI; priority 10.

• PIMS SCSI; priority 11.

• Satellite clock system (highest accuracy); priority 12.